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Topic 4 · Section 20

Communicating and Sharing the Road

Communication is not just for polite conversation; on the road, clearly signaling your intentions and understanding others’ signals is fundamental to preventing mishaps. Sharing the road means being cooperative, not competitive. Here’s how to do your part:

🕹️ Use of Turn Signals

  • Always signal for turns and lane changes – it’s both legally required and courteous.
  • In city driving, signal at least 100 feet before a turn (a few seconds ahead).
  • On highways or at higher speeds, signal for at least 5 seconds before changing lanes.
  • Do not signal while already turning – that defeats the purpose.
  • Make sure to turn off your signal after completing the maneuver if it doesn’t auto-cancel, to avoid confusing others.

💡 Brake Lights

  • Tap your brakes lightly a couple of times before slowing significantly or stopping, especially if someone is close behind.
  • The flashing lights alert the driver behind you that you’re about to slow.
  • Example: If traffic is stopped ahead around a bend, tap your brakes early to warn those behind.

📯 Horn Usage

  • Use your horn sparingly and appropriately:
    • A quick honk can alert a drifting driver or someone not noticing a green light.
    • On narrow or blind-curve roads, a light honk can warn oncoming traffic.
  • Avoid honking in anger – long blasts can escalate tension and lead to road rage.
  • Remember: The horn is there to prevent accidents, not to punish mistakes.

Check you have it

179 practice questions cover defensive driving and safe driving practices, each explaining the reasoning behind its answer.

Practise this topic

Source: California Driver's Handbook (DL 600, rev. 6/2025). Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.

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